Abdollahi Mirzanagh, Elham ; Taucher-Scholz, Gisela ; Jakob, Burkhard (2018)
Application of Fluorescence Lifetime Imaging Microscopy of DNA Binding Dyes to Assess Radiation-Induced Chromatin Compaction Changes.
In: International Journal of Molecular Sciences, 19 (8)
doi: 10.3390/ijms19082399
Artikel, Bibliographie
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Kurzbeschreibung (Abstract)
In recent years several approaches have been developed to address the chromatin status and its changes in eukaryotic cells under different conditions—but only few are applicable in living cells. Fluorescence lifetime imaging microscopy (FLIM) is a functional tool that can be used for the inspection of the molecular environment of fluorophores in living cells. Here, we present the use of single organic minor groove DNA binder dyes in FLIM for measuring chromatin changes following modulation of chromatin structure in living cells. Treatment with histone deacetylase inhibitors led to an increased fluorescence lifetime indicating global chromatin decompaction, whereas hyperosmolarity decreased the lifetime of the used dyes, thus reflecting the expected compaction. In addition, we demonstrate that time domain FLIM data based on single photon counting should be optimized using pile-up and counting loss correction, which affect the readout even at moderate average detector count rates in inhomogeneous samples. Using these corrections and utilizing Hoechst 34580 as chromatin compaction probe, we measured a pan nuclear increase in the lifetime following irradiation with X-rays in living NIH/3T3 cells thus providing a method to measure radiation-induced chromatin decompaction.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2018 |
| Autor(en): | Abdollahi Mirzanagh, Elham ; Taucher-Scholz, Gisela ; Jakob, Burkhard |
| Art des Eintrags: | Bibliographie |
| Titel: | Application of Fluorescence Lifetime Imaging Microscopy of DNA Binding Dyes to Assess Radiation-Induced Chromatin Compaction Changes |
| Sprache: | Englisch |
| Publikationsjahr: | 2018 |
| Ort: | Basel |
| Verlag: | MDPI |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | International Journal of Molecular Sciences |
| Jahrgang/Volume einer Zeitschrift: | 19 |
| (Heft-)Nummer: | 8 |
| Kollation: | 15 Seiten |
| DOI: | 10.3390/ijms19082399 |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | In recent years several approaches have been developed to address the chromatin status and its changes in eukaryotic cells under different conditions—but only few are applicable in living cells. Fluorescence lifetime imaging microscopy (FLIM) is a functional tool that can be used for the inspection of the molecular environment of fluorophores in living cells. Here, we present the use of single organic minor groove DNA binder dyes in FLIM for measuring chromatin changes following modulation of chromatin structure in living cells. Treatment with histone deacetylase inhibitors led to an increased fluorescence lifetime indicating global chromatin decompaction, whereas hyperosmolarity decreased the lifetime of the used dyes, thus reflecting the expected compaction. In addition, we demonstrate that time domain FLIM data based on single photon counting should be optimized using pile-up and counting loss correction, which affect the readout even at moderate average detector count rates in inhomogeneous samples. Using these corrections and utilizing Hoechst 34580 as chromatin compaction probe, we measured a pan nuclear increase in the lifetime following irradiation with X-rays in living NIH/3T3 cells thus providing a method to measure radiation-induced chromatin decompaction. |
| Freie Schlagworte: | FLIM microcopy, Hoechst 34580, Syto 13, chromatin compaction, histone deacetylation inhibitor (HDACi), irradiation, pile-up |
| Zusätzliche Informationen: | This article belongs to the Special Issue Advances and Challenges in Biomolecular Radiation Research |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 530 Physik 500 Naturwissenschaften und Mathematik > 570 Biowissenschaften, Biologie |
| Fachbereich(e)/-gebiet(e): | 10 Fachbereich Biologie 10 Fachbereich Biologie > Radiation Biology and DNA Repair |
| Hinterlegungsdatum: | 15 Jan 2024 08:58 |
| Letzte Änderung: | 16 Jan 2024 08:01 |
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Application of Fluorescence Lifetime Imaging Microscopy of DNA Binding Dyes to Assess Radiation-Induced Chromatin Compaction Changes. (deposited 12 Jan 2024 13:46)
- Application of Fluorescence Lifetime Imaging Microscopy of DNA Binding Dyes to Assess Radiation-Induced Chromatin Compaction Changes. (deposited 15 Jan 2024 08:58) [Gegenwärtig angezeigt]
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